Stove-pipe



(No Model.)

J. J. VOLLRATH.

STOVE PIPE. v No. 269,749. Patented Dec. 26, 1882.

W/T/VESSES By his A Horneys N PETERS. Pholo-Lilhognphsr. Wishingiou. 0. c

UNITED STATES PATENT OFFICE.

JACOB J. VOLLRATH, OF SHEBOYGAN, WISCONSIN.

STOVE-PIPE.

SPECIFICATION forming part of Letters Patent No. 269,749, dated December 26, 1882 Application filed March 3, 1882. (No model.)

To all tehom it may concern:

Be it known that I, JACOB J. VOLLRATH, a citizen of the United States, residing at Sheboygan, in the county of Shehoygan and State of Wisconsin, have invented certain new and useful Improvements in Stove-Pipes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same,reference being had to the accompanyingdrawings, and to letters or figures of reference marked thereon, which form a part of this specification.

The present invention is designed to obviate the defects and disadvantagesof ordinary metalliostove-pipes,wh1ch as heretofore made are easily affected by rust ordestroyed by exposure, and require, in consequence thereof. to he frequently replaced. Stove-pipe requires to he blackened and polished to give it a presentable appearance, and such pipes as need no blacking are easily stained and spoiled by handling. Stove and furnace pipe in particular, the component sections of which are united by ordinary slip-joints, are liable to become so firmly incrusted at the joints as to render a separation thereof a very difiicult matter. The pyioligneous acid,resnlting from the combustion of the fuel, is also liable to corrode or injure the metal by coming in contact therewith.

In order to avoid the defects above stated, and to make the articles towhich my invention may be applied firm and tight in their respectivejoints and bindings, I apply to the entire inner and outer surfaces of slipjoint stove-pipes a vitreous coating of enamel composition. As applied to stove-pipes, such an enamel will give the same apermanently glossy and polished surface, which is not injuriously affected by exposure to air, heat, orsmoke, thus preserving the pipeiiitactaud completely preventing incrustation at the joints or injury of the metal by the corrosive action of pyroligneous acid.

The vitreous coating is applied to the pipes substantially as follows, viz: The pipe to be covered is coated with borax, which is burned on to make it part of the iron. Theinner and outer surfaces of the pipe are then covered with a liquid enamel madeof the ordinary vitrifiable materiahand similar to that described in Letters Patent granted to me by the United States, dated December 6, 1881, No. 250,465, which composition is in turn tirmly burned on.

The enamel coating may be of any color, as is well understood in the art of enameling metals.

By the term slip-joint pipes, as used in the present instance, I desire to include all forms of stove-pipe joints in which one section enters another, and it will readily be understood that the screw-joint is embraced in said term.

In addition to the functions of the vitreous enamel as an ornamental covering and noncorrosive lining, it may be stated that the enamel serves to assist in holding the seam of the stove-pipe.

In the drawings, Figure 1 illustrates two pipe-sections united by a slip-joint. Fig. 2 is an enlarged sectionalviewexhibitingtheinner lining and outer coating of the pipe.

The letter A designates the pipe, B the lin ing, and O the outer coating.

I am aware that sheet-metal vessels, hosenozzles, pump-cylinders, water-closet bowls, and other objects have been coated with a vitreous enamel,and I make no claim to any article other than a sheet-metal slipjoint pipe which is lined and covered with a vitreous enamel and possesses the functions and advantages hereinbefore fully explained.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

Asa. new article of manufacture, a sheetmetal slipjoint stove-pipe made in sections, and having its interior and exterior surfaces coated with a vitreous enamel, as and for the purpose set forth.

In testimony whereof I afiix my signaturein presence of two witnesses.

J AGOB J. VOLLRA'IH.

Witnesses:

WM. H. SEAMAN, FRANCIS WILLIAMS. 

